Patent US2996664A successfully refreshed from Google Patents.
US2996664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corona detector
Assignee: Allis Chalmers Corp
•
Filing: 1958-01-20
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Granted: 1961-08-15
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Expires: 1978-01-20
Abstract
No abstract record available.
Inventors
- 👤 Fred J Vogel
- 👤 Edward J Adolphson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:30
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2525413A
Cited
US2627546A
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US2713639A
Cited
US2750562A
Cited
US2802180A
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US2883616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |